wmweather+ provides a monitor on a 64x64 mini window that displays the
current weather conditions, forecast data (US only), and optionally a
radar image. It will also watch for various warnings and display them
using an external command.
wmweather+ is designed to work with the WindowMaker dock, but will work
with other window managers as well. Think wmweather with a smaller font,
forecasts, a weather map, and a sky condition display.